Improved oar-brake



uiten tetrs @anni @ffiw EUGNE HIPPOLYTE D'URU, 0F PARIS, FRANCE.

Letters Patent No. 71,720, dated December 3, 1867; patented in France, October 25, 1867.

IMPROVBD GAR-BRAKE.

TO ALL WHOM IT MAY OONGERN:

Be it known that I, EUGNE HIPPOLYTE DURU, of Paris, in the Empire of France, have invented a new and useful Improvement in Railway-Brakes; and I do hereby declare that the following is full, clear, and4 exact description of the construction and operation of the same, Ireference being had to the annexed drawings, making a part ot`-this specification, in which drawing- I Figure 1 is al rear end view in elevation of a wagon with this new brake fixed to it.

Figure 2 is a partial side view oi' the same.

Similar letters indicate corresponding` parts.

A is the handle to set the tension-roller or windlass into motion. Bis a windlass or tensionr0ller, on which wind the chains or cords, which tighten the jaws of the pineers. In the middle of this roller is fixed a cord or rope, N, by means of a hook, which cord or rope serves to raise up the pineers as soon as slackencd. C C are the pineers, the lower extremities of which {it the rails. C C are the jaws of the pineers. D I) are boxes containing the pineers. .E E are slidcblocks to maintain the pineers on a level with the upper part of the rail, whatever may bc-the variations occasioned by the loading oi' the cars. F F are pulleys, serving toguide the chains or ropes. Gr G is the apparatus to maintain thewholc tight, as may be required. I I are springs to open the jaws. K is the hand-wheel onwhich the handle A is secured. M is a chain or rope connecting this hand-wheel with the pineers at the opposite end of the enr. 'The pineers C consist, like ordinary pineers, oi' two arms or-jaws, which open by means of springs, and close by means of chains working in an inverse direction,

Aso as to compel the machine to bite the head of the rail, and may bc .so constructed as to avoid thc obstacles resulting either from joints or from the railroad-chairs. In view of this the jaws Care scooped out so as to vavoid every impediment that might occasion a shock.` The pineers C arc contained in the iron box D, ixed at the lower cross-piece -or at the bottom of' the car, and 4steadied by an iron bar, to insure solidity. The pineers C receive theirv movement froiathe handle A, placed at the upper part ofthe vertical cylinder or windlass B, on which wind the chains or ropes of the pineers C, by passing onl the pulleys F,as also a third chain fixed at the centralpointoi` the pineers C, which serves to'elevate them when the brake is slackened. This chain, less stretched than the others, winds on the wiudlass in an inverse direction, and it Serves to keep the pineers constantly. on a level with'the heads of the rails, whatever .movements or variations of level may occur in the loading oi' the cars. The pineers may be directly actuated by the engineer, by means of a chain or rope, M,wound round the hand-wheel K. The slide-block E, held in position by a fork, fixed at -the central point of the pineers, is placed behind them, which liftsand lowers with them, as may be required, through an opening made in the'box D of the pineers, as shown in the accompanying drawing. To prevent the pinc'ers from experiencing any side shocks-in consequence of the back-lashing oi the cars when in motion, it is merely necessary to give a little freedom to the chains orropes. Underneath the handle A is a ratchet-wheel, for the purpose of tightening the brake.

From what has been said it is easily understood .how rapid is the means of tightening, and the action is such that a train running at full speed may he stopped without a shock within a comparatively short length of ruil, so that the meeting of trains may be avoided, and the danger to the travelling public is materially reduced.

This kind of. brake possesses, moreover, a great advantage over any other, viz, that oi' preventing the train from .runningoi` the track. The jaws biting the heads of the rails, necessarily retain the train in an upright position. Two of -these brakes to each train will fully replace the old brakes.

What I claim as new, and desire to secure by Letters Patent, is

The adjusting-gear'B 4F N, in combination with the pineers C and with a. railroad-car, substantiallyas andv for the purpose set forth.

E. H. DURU.

Witnesses Cu. GoUvELLEBn; H. BONNEVILLE. 

